Sensitive plate, film, or the like for color prints



w. V. D. KELLEY SENSITIVE PLATE}, FILM, OR THE LIKE FOR COLOR PRINTSAug. 21, 192 3.

Filed March 23 1920 Patented Aug. 21, 1923.

WILLIAM V. D. KELLEY, F BROOKLYN, NEW YORK, ASSIGNOR TO PRIZMA,

- INCORPORATED, A CORPORATION OF MAINE.

SENSITIVE PLATE, FILM, OR THE LIKE FOR COLOR PRINTS.

Application filed March 23, 1920. Serial No. 368,056.

To all whom it may concern:

Be it known that I, WILLIAM V. D. KEL- LEY, citizen of the UnitedStates, and resident of Brooklyn, in the county of Kings 6 and State ofNew York, have invented certain new and useful Improvements in SensitivePlates, Films, or the like for Color Prints, of which the following is aspecification.

This invention relates to photographlc material and has particularreference to the production of photographic material as an article ofmanufacture ready for the usual printing with negatives by the user.

The object of the invention is to simplify the procedure necessary to befollowed by producers of colored pictureson plates, film or paper, andmore particularly transparencies reproducing the colors of natureon theadditive light.

At thepresent time, so far as I am aware, manufacturers of coloredpictures are compelled to perform in their own plants prac- 2 ticallyall the special operations necessary to produce the pictures, as themanufacturers of sensitized paper, plates and films, only make upspecial materials of this character for manu acturers of coloredpictures upon order, which involves excessive expense to the purchaser,non-uniformity of material owing to the present relatively smallconsumption, and also delay in obtaining even ordinary material forcolor work owing to the special care required in the manufacture ofplate, film or paper, for color work uniformity required in difierentlots, like printing speeds of different emulsions, etc. At the presenttime there are no light sensitive media in the market specially preparedfor use in producing colored pictures, whereas if such partiallyprepared materials can be principle by transmitted obtained there willimmediately be a verywide extension of color photography owing tosimplification of the work to be done.

In my application 243,879, filed July 8, 1918, patented April 20, 1920,#1,337,77 5, is disclosed a process for producing colored pictures onthe additive principle, and the resulting colored picture product, whichis peculiarly suitable for use by workers of orinary skill, provided theprecision work necessary in preparing the plate or film to receive thecolor value images is'already performed. As will be seen upon referenceto said application and patent, the plate or film is firstphotographically printed with a finely subdivided pattern or design,leaving in the interstices of the emulsion residual sensitive portionswhich receive the impressions from the color value negative.- A doublecoated plate or film is specifically shown having the design on one sidein registry with the sensitive portion on the other, the finished plateor film being produced by 06 coloring both the image and design on ones1de in one color and the image and design on the other side in anothercolor, and additlvely producing complete color when the design issufiiciently fine. Exceedin ly accurate work is required in making t ede- Slgn printlng screens, and also in printing the design on thesensitized plate or film, and in accurately corelating the second designon the other side, and in the case of relatively narrow motion picturefilms for example, an unnecessary expense is involved in printing thestrip, immediately before the negatives are printed.

It is the object of this invention to provide as an article ofmanufacture, design printed undeveloped sensitized plate or film to bemade by the manufacturer in large quantities, and sold to the tradeready for printing from negatives. Thereby, the manufacturer 8 ofcolored pictures is relieved of the necessity of having the necessaryscreens and doing his own design printing, but can obtain the desireddesign in rinted stock, either single coated or doub e coated, from theto manufacturer at low cost and with the assurance of greateruniformity.

This application is in part a continuation of (siaid application 243,879and patent aforesai In the accompanying drawings:

Figure 1 shows a single coated photo-s graphic plate or film embodyingthe invention,

to ether with the designs displaced, and

igure 3 shows a double coated plate or film such as illustrated inFigure 1 of the aforesaid patent, embodying the invention.

Referring to Figure 1, 1 represents the base, either of transparent,translucent or opaque paper, glass, celluloid or the like, carrying anordinary sensitive emulsion 2. This material is ordinarily made up inlarge sheets by the manufacturer, and in the case 110 Figure 2 shows twotransparencies placed of plates and papers, is cut to stock size andpacked forthe trade. In the case of films, the large sheets are slitalong the dotted lines shown in dark rooms into strips then perforatedalong the edges in the dark and packed for shipment. Heretofore it hasbeen necessary for the user of these materials to provide his ownscreens, precision printing mechanism, etc., in sufiicient quantity toproduce the desired output of prepared sensitized positive film.

According to this invention the manufacturer of the film, plate or paperwill print the pattern design thereon before he ships, and mosteconomically will do this in machines which handle the original largesheets or webs. In printing single coated sensitized positive plates,film or paper the screens may be in the form of opaque or black lines onthe surface ofsolidglass cylinders with the light, inside, so as toprint continuously, it being seen that the light will pass between thelines andproduce a latent image in the emulsion. The material can thenbe cut up and handled and shipped in the ordinary manner of handlingunexposed sensitized photographic materials.

In Figure 2 are shown two glass plates put together face to face withdesigns displaced, and secured together, to receive images ofcomplementary color families in the unexposed portions 3, 4 being theprinted undeveloped design.

In Figure 3 the base 1 is transparent and carries on each side anemulsion 2 printed with lines 4 relatively displaced and having residualsensitive relatively displaced portions 3.

The designs may be of any desired symmetrical pattern such as parallellines, or checker board, etc., but generally the total area of theprinted portions will preferably slightly exceed the total area of theunprinted portions. In the case of double coated plate or film as inFigure 3 for example, the printed lines 4 on one side will be veryslightly wider than the underlying imprinted lines 3 by an amount to bedetermined by experience, and to some extent by the particular chemicalprocess used for applying and fixing the color. The reason for this isthat a preferred method of coloring is to bleach and mordant the lines,

and I have found by experience that some of these bleaches and mordants,as well as the other treatments necessary in supplying the color, tendto cause the gelatin carrying the bleached portions to appreciablyshrink, so that if there is not a slight overlap of the printed portionsof the design on each side there might be a separation owing to thisshrinkage of the gelatin. If there is too much overlap objectionablelines of black will be produced.

The particular manner of photographi menses cally printing the designson the sensitized material is not material to the invention, as variousmethods are possible, such as using flat screens instead of rollersofi'set printing methods using opaque removable inks or resists, etc.Care must be exercised in printing double coated plate or film to'obtainthe necessary registration of the designs so as to maintain the properdisplacement, but this will not furnish any particular difficulty to themanufacturer, inasmuch as there is no shrinkage of the photographicstock to be taken care of. Where a plurality of displaced designs isembodied in one base, as in Figure 3, for example both de signs shouldpreferably be printed at once as by rollers or flat screens held inproper registry by suitable pins. If the designs are once printedsubsequent shrinkage due to treatment becomes immaterial because alikeon both sides. Where two single coated transparencies are put togetherby hand, as in Figure 2, very satisfactory registration can be effectedby eye; assuming that the designs are alike andv of equal or nearlyequal total area in printed and unprinted portions.

In the production of colored motion picture films on the additive princile, this in- *WBDtlOIl will furnish a decided a vantage by enabling thepossessor of color selection negatives to make his ositive prints andthen to complete the colbring by suitable processes desired.

I have found that for color motion picture work a design composed of 800parallel lines to the inch is sufliciently fine to blend in transmittedlight giving extremely beautiful colors. good perspective and purewhites, but I expressly do not restrict myself to any specific finenessor design.

Where I speak of making the displaced impressions in different strata ofemulsion,

I intend to include both the species of Figure 3 having the strata onopposite-side's of the base, and also a form such as in F i ure 1wherein one design can be printed rom the front, and the other in theinner stratum of emulsion through a transparent suport. i

In both of these forms it will be observed that development and fixingof the latent design images alone will simply produce a singlediscontinuous black image on the entire support, and that in thefinished positive printed from color value images, the latter togetherconstitute but a single discontinuous image. 1 Ultimately in order toview this image, the black design image will be rendered transparent,and toned, but additive color transparenci can be produced from theproduct of this invention without coloring the images, by a processother than that specifically disclosed in said application #243879.

menses I also intend to cover in the claims an op positely coatedsupport such as in Figure 3, havin the desi n in one emulsion, and theother deft comp ete for such further use in making a color transparencyas may be desired by the user, as at the present time, there arenumerous known Ways of producing additive color transparencies otherthan that specifically shown and claimed in the patent aforesaid. Forregistration of a plurality of negative images on opposite sides, or thesame side, of the same positive area, the registration method shown inmy Patent #l,259,411, March 12, 1918, will be satisfactory.

.What I claim is:

1. As a article of manufacture, a support carrying sensitivephotographic emulsion and having impressed therein a latent imagecomprising a subdivided additive screen design provlding residualsensitive portions.

2. As an article of manufacture, a transparent support carryingsensitive photographic emulsion having impressed in one stratum thereofa latent ima comprising a subdivided additive screen esign providingresidual sensitve portions, and in another stratum a like latent screenimage providing like residual sensitive portions, the respective designsand sensitive portions being relatively displaced so that latent imageportions in One stratum overlie residual sensitive portions in theother.

3. As an article of manufacture, a trans parent support carrying asensitive photographic emulsion on each side, at least one of saidemulsions having impressed therein 'a latent image comprising asubdivided additive screen design providing residual sensitive portionsto subsequently receive an image.

4. As an article of manufacture, a transparent support carrying asensitive photographic emulsion on each side having impressed in each ofsaid emulsions a latent image comprising a subdivided additive screendesign providing residual sensitive portions, the respective designs andsensitive portions being relatively displaced so that atent ima eportions in one emulsion overlie residua sensitive portions in theother.

5. As an article of manufacture, a support carrying sensitivephotographic emulsion having impressed therein a latent image comprisinga subdivided additive screen design providing residual sensitiveportions, the total area of latent image portions exceeding that of thesensitive ortions.

S an article of menu acture, a transparent support carrying asensitivephotographic emulsion on each side having impressedin each ofsaid emulsions a latent image comprising a subdivided additive screendesign providing residual sensitive portions, therespective designs andsensitive portions being relatively displaced and of such diderent areasthat latent image portions in one emulsion overlie and overlap theresidual sensitive portions in the other emulsion.

7. As an article of manufacture, a transparent support carryingsensitive emulsion velopment the whole produces a single disand; asingle discontinuous design image continuous image from two negatives.

Signed at New Yorkin the county of New York and State of New York, this19th day of March, 1920.

ILLI 2 V. D. KELLEY.

